which-of-the-following-concerning-uniform-circular-motion-is-true-a-the-centrifugal-force-is-the-act

Question

Which of the following concerning uniform circular motion is true?
(A) The centrifugal force is the action-reaction pair of the centripetal force.
(B) The centripetal acceleration and velocity point in the same direction.
(C) The velocity of the object in motion changes, whereas the acceleration of the object is constant.
(D) A satellite undergoing uniform circular motion is falling toward the center in a circular path.

Vishal Gupta · Accepted Answer

Hi in the given problem. In the first option, which says the century few Gle force mix an action reaction pair with the centripetal force. This is false because centrifugal force does not make and action reaction here with the Century people force. Hence this statement is balls because actually Century people force comes into light when centripetal force is missing so they do not go exist. They do not exist together. Now, Option B, centrifugal acceleration is radial while the velocity is tangential, so their direction cannot be seen. Yes, this is also false. Centripetal, not centrifugal Century detail force is radial and velocities tangential always in a uniform circular motion so your direction cannot be seen. This one is also falls an option C velocity and acceleration. Both are very able because the direction of both of them keeps changing. So this statement is also false because they say that acceleration velocity is variable and acceleration is constant. No, this is also false. So velocity and acceleration rather we should say centripetal acceleration both are, but he bows. Does their direction keep on changing at each and every point of the circular motion has. This one is also false. Finally, option disease a satellite in uniform circular motion always falling towards the center of the circular motion. So this one is true. Hence we can see here our option B is courage because every time suppose this is the center of circular path, this one is the center. So whenever we consider an object at any point of this circular trap, every time, ex tendency will be to fall towards the center every time it is trying to move towards the center but failing in doing so so optionally is correct. Here. Thank you.

Salamat Ali · Answer

object moving in. The uniforms are full of emotion. Suppose there were lost. He changes with speed. Amanda Constant and the acceleration is a directed towards the center, therefore Ocean B and the other right.

Averell Hause · Answer

So here the answer is C uh, See again, Is this in tropical Force X and T Parallel? This will be anti hello to me. Some trip. Good Tool Force vector. No, this is because here the question stem indicates that the centrist ical force is reactionary and gives its direction. We can then say that this is ah centric fickle forces the reactionary force to this centripetal force. So according to Newton&#x27;s third Law, these forces must be equal in magnitude and opposite in direction. So again, anti parallel again. This is due to new tunes. Third Law, you can say in this case, every force has brother. Every action has an equal and opposite reaction. That is the end of the solution. Thank you for watching.

Ze-Han Lee · Answer

right. So in this problem, we&#x27;ve seen that object moving at a constant speed around, uh, circular psychopath. So, uh, basically, we know that Ah, the speed we is a constant. So the isn&#x27;t this intricate of generation a equal v squared over r, right? And the radius is a constant, of course. So this is a constant and ah ah, the velocity is changing Because the acceleration here is not the euro s o the velocity. Ah, actually, the direction of the loss that is changing. So the cracks of the correct answer for this Ah, problem is Ah a and Ah, see? Okay.

Averell Hause · Answer

So during uniform circular motion, we have for, ah four phrases which one is true on. And we can say that, uh, right off that is a no work is done. So this is for a couple of reasons. So no work is done, and we can say that one. Um, no work is done because first, in order for work to be done, we have the force Equalling the displacement Co sign off data. Now. That would mean that this, uh, co sign here, the state A has to be zero degrees, which would make this one. However, it&#x27;s not the case in the sense of uniform circular motion given that here, if he force here were too, um, depend on the direction of the centripetal acceleration. We can say that if we were to have this would be pivot and mia a mass with a uniform circular motion undergoing uniform circular motion here would be the acceleration vector, and the velocity vector would always be tangent to the trajectory of the object. And so we can say that Then this angle okay, Fada equals 90 degrees for ah, uniform circular motion. And so, given that we can say again A is the correct answer. No work is going to be done. And of course, no work is being done by the centripetal force. No work is being done by the velocity. Or rather, velocity is not a force, so it can&#x27;t do work. Velocity doesn&#x27;t have the ability and ah, the potential energy uh, there&#x27;s not depend of does not depend on the position of the object within its own trajectory. So again, ah, statement A is the only true statement. No work is being done during uniform circular motion that is thean of the solution. Thank you for watching.

Ze-Han Lee · Answer

All right, so in this problem Ah, the satellite ihsaa moving, moving allows circular orbits. So out of the earth. So there&#x27;s this that light. Ah, so we have four choices. The choice A says that there are no forces acting on the satellites. So this is all right, Because we have the gravitational force, Ray. So G Corp sorry f g quo G times and and over our squid. So, Captain, I m is the mass of the earth. And the small am is the mess of the satellites. And r is the distance from the center of the earth to the satellite. All right and choice pieces that the force of gravity is the only force acting on the satellite. This is the right, All right, So he&#x27;s right and just say says that the force of the gravity it&#x27;s balanced to buy out by out war force off the object isn&#x27;t all right. We do not say such a force, Okay? And she&#x27;ll say Choice T says that Ah, the mass of the satellite has no effect on the officer speed. This is also right, because ah, to obtain a speed off this satellite when it leaves the question. The central force. The square of our times am it? Call the gravitational force ray G times m and over our sweat So we can see that the velocity of this, the speed off this Ah satellite equal square root G M R. Okay, so we do not rely on the mass of the sun light. So these right? Okay.

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A girl of mass m and a boy of mass 2m are sitting…

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